Python Loops

Loops in Python allow us to execute a block of code multiple times, making our programs more efficient and reducing redundancy.

For Loop

The for loop is used to iterate over a sequence such as a list, tuple, or string.

fruits = ["apple", "banana", "cherry"]
for fruit in fruits:
    print(fruit)
        

Using Range in For Loop

for i in range(5):
    print("Iteration:", i)
        

While Loop

The while loop executes as long as a condition remains true.

x = 0
while x < 5:
    print("Value of x:", x)
    x += 1
        

Break Statement

The break statement exits a loop prematurely when a condition is met.

for num in range(10):
    if num == 5:
        break
    print(num)
        

Continue Statement

The continue statement skips the current iteration and moves to the next.

for num in range(10):
    if num % 2 == 0:
        continue
    print(num)
        

Nested Loops

Loops can be nested inside other loops to iterate over multiple sequences.

for i in range(3):
    for j in range(3):
        print(f"i={i}, j={j}")
        

Looping with Else

The else block in loops executes when the loop completes without a break statement.

for num in range(3):
    print(num)
else:
    print("Loop completed successfully")
        

Conclusion

Loops are fundamental to Python programming, allowing repetitive tasks to be handled efficiently.